Ключевые слова: aid, background, care, chart, clinic, device, diagnosis, diopter, doctor, equipment, exam, examination, eye, eyeglasses, eyesight, eyewear, focus, glasses, health, healthcare, instrument, lab, laboratory, lens, measurement, medical, medicine, microscope, nobody, ophthalmic, ophthalmologist, ophthalmology, optical, optician, optometrist, optometry, professional, science, sight, store, technology, test, tool, treatment, vision, visual, white,